10th edition of the conference on Textile Composites and Inflatable Structures最新文献_第2页

Technical Design rules of ETFE membrane structures using the tensile strength measurements in production and development 用抗拉强度测量方法进行ETFE膜结构生产和开发的技术设计规程

10th edition of the conference on Textile Composites and Inflatable Structures Pub Date : 1900-01-01 DOI: 10.23967/membranes.2021.033

T. Balster, C. Maywald, D. Lazarev, B. Kammer

引用次数: 0

On time- and temperature-dependent material behaviour of ethylene-tetraﬂuoroethylene foils in building construction 建筑施工中乙烯-四氟乙烯箔材料性能随时间和温度的变化

10th edition of the conference on Textile Composites and Inflatable Structures Pub Date : 1900-01-01 DOI: 10.23967/membranes.2021.018

P. Beck

{"title":"On time- and temperature-dependent material behaviour of ethylene-tetraﬂuoroethylene foils in building construction","authors":"P. Beck","doi":"10.23967/membranes.2021.018","DOIUrl":"https://doi.org/10.23967/membranes.2021.018","url":null,"abstract":"Ethylene tetrafluoroethylene (ETFE) foils exhibit a non-linear viscoelastic material behaviour. For the dimensioning of safe and durable structures made of ETFE foils it is necessary to take this material response into account regarding single-layer, mechanically prestressed and multi-layer, pneumatically prestressed constructions. Systematic and comprehensive investigations with respect to the time-dependent material behaviour have not been published to date. For individual, more project-specific data, please refer to [2], [3], [4]. In order to investigate the time-dependent material behaviour of ETFE foils under permanent loads (retardation, creep), permanent load and load repetition tests were carried out in the form of uniaxial tensile tests. The non-linear influence of the load on the time-dependent material behaviour was investigated by performing tests under four different stress levels, each combined with the influence of a constant temperature by means of three test temperatures. The experimental investigations aiming at the long-term behaviour of the ETFE foils with test durations between 1200 h and 4000 h were supplemented and completed by tests under anisothermal, natural climate. These continuous load tests were performed for approximately 8 years. For the description of the material response, a rheological model is proposed. This model is based on Burgers’ model, which, for the purpose of this study, was enhanced by additional model parameters to take into account the stress level and the temperature. The comparison of the experimental and the projected strain-time-curves proves the model’s applicability for describing isothermal continuous load tests. All of the","PeriodicalId":395358,"journal":{"name":"10th edition of the conference on Textile Composites and Inflatable Structures","volume":"60 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131417658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spring-mass-damper modelling of out-of-plane-bending versus in-plane-membrane resistance of parachute canopy 伞盖面外弯曲与面内膜阻力的弹簧-质量-阻尼器模型

10th edition of the conference on Textile Composites and Inflatable Structures Pub Date : 1900-01-01 DOI: 10.23967/membranes.2021.024

M. Charlotte, C. Espinosa, L. Gérardeaux

{"title":"Spring-mass-damper modelling of out-of-plane-bending versus in-plane-membrane resistance of parachute canopy","authors":"M. Charlotte, C. Espinosa, L. Gérardeaux","doi":"10.23967/membranes.2021.024","DOIUrl":"https://doi.org/10.23967/membranes.2021.024","url":null,"abstract":"Thin, flexible fabric-like structures interacting with fluids (parachutes, airbags, biological skins etc.) have behaviors that are not representable as simple membranes that conventionally work only in stretch and shear. As very often observed in fact, these structures can form wrinkles (and folds) that are due to small and medium resistances to out-of-plane bending and to micro-buckling in shear and compression in the tangent plane of the structure [1, 2]. In the classical Finite Element Methods, this passage between membrane forces and out-of-plane is done with models of shells and plates which connect the rotations of the edges of a surface element with the flows of internal membrane forces, via functions of interpolation and derived from the elastic strain expression. In a networked Mass-Spring-Damper System (MSDS), there is no longer such interpolation features. Being proven that the flexural strength of these structures has an important role in the interaction with the surrounding fluids, it is impossible with these MSDS to represent these relations between bending and membrane effect without additional corrective internal forces (or moments). The problem is that, depending on the method used to take these compensating forces into account, differences of force fluxes (i.e. equivalent stresses) in the response of the structure are obtained. As a prerequisite for the optimal identification of parameters from intrinsic effective values, this communication aims at presenting comparisons between different strategies based on MSDS [3-9] in order to subsequently propose an adapted choice. Our numerical investigation notably shows the location and amplitude of the bending moments generated by the addition of out-of-plane internal forces which can lead to","PeriodicalId":395358,"journal":{"name":"10th edition of the conference on Textile Composites and Inflatable Structures","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124725621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Refurbishment and end of life roof membrane structure of the Teatro Verdi in Montecatini Lucca 卢卡蒙特卡蒂尼威尔第剧院屋顶膜结构的翻新和寿命结束

10th edition of the conference on Textile Composites and Inflatable Structures Pub Date : 1900-01-01 DOI: 10.23967/membranes.2021.056

C. Vannelli

引用次数: 0

Fast model generation and static calculation of combined pneumatic and mechanically stressed structures 气动与机械复合受力结构的快速模型生成和静力计算

10th edition of the conference on Textile Composites and Inflatable Structures Pub Date : 1900-01-01 DOI: 10.23967/membranes.2021.061

Jürgen Holl, D. Ströbel

{"title":"Fast model generation and static calculation of combined pneumatic and mechanically stressed structures","authors":"Jürgen Holl, D. Ströbel","doi":"10.23967/membranes.2021.061","DOIUrl":"https://doi.org/10.23967/membranes.2021.061","url":null,"abstract":"Computer models have long been essential for the static calculation of membrane or foil structures. In the case of combined pneumatically and mechanically tensioned structures, the generation of the models and the statical calculation is often a challenge. With pneumatic structures, we are basically dealing with 2 groups: The first group includes the pneumatic structures over an arbitrary boundary. These structures can only be created by a form-finding process considering an internal pressure. The second group includes pneumatically feasible structures like cylinders and spherical segments which are combined to form complete structures. These purely geometrically defined shapes can be created relatively easily by mathematical functions. To keep the manufacturing process simple and production costs low, it is still often seen today that the form-finding process is omitted in case of pneumatically feasible structures. In the case of combinations of pneumatically feasible structures, e.g. tube systems, nurbs geometry is often used. With nurbs, such structures can be easily generated and, above all, intersections between volume geometries can be easily created. When it comes to combinations of known pneumatically feasible structures together with mechanically stressed parts, it is not possible to completely omit the form-finding process. The mechanically tensioned parts are usually not in force equilibrium after generation via nurbs surfaces. Therefore, in the case of such combined systems, a form finding for the mechanically stressed parts is necessary. In this article, we show an example of how a pneumatically feasible tube system with mechanically stressed wall elements based on nurbs surfaces can be quickly generated and then statically calculated in our system. For this task, a discrete topologically correct and watertight mechanical model will be generated based on the nurbs model. The user","PeriodicalId":395358,"journal":{"name":"10th edition of the conference on Textile Composites and Inflatable Structures","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126756979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modelling of double layer and textile biogas storage systems 双层和纺织沼气储存系统的建模

10th edition of the conference on Textile Composites and Inflatable Structures Pub Date : 1900-01-01 DOI: 10.23967/membranes.2021.005

R. Wagner, K. Heinlein

引用次数: 0

Finite element models to simulate lightweight rockfall protection structures 模拟轻型岩崩防护结构的有限元模型

10th edition of the conference on Textile Composites and Inflatable Structures Pub Date : 1900-01-01 DOI: 10.23967/membranes.2021.001

K. Sautter, H. Hofmann, C. Wendeler, M. Celigueta, P. Bucher, K. Bletzinger, R. Wüchner

引用次数: 2

Switching transformation for soft pneumatic adaptive shading 软气动自适应遮阳的切换变换

10th edition of the conference on Textile Composites and Inflatable Structures Pub Date : 1900-01-01 DOI: 10.23967/membranes.2021.020

R. Aditra, P. Beccarelli, C. Jimenez-bescos

引用次数: 0

End-of-life scenarios of membrane structures: is circularity an option? 膜结构的寿命终结:是一个选择吗?

10th edition of the conference on Textile Composites and Inflatable Structures Pub Date : 1900-01-01 DOI: 10.23967/membranes.2021.012

M. Mollaert, G. Sonmez, M. Craenenbroeck, L. Laet

引用次数: 0

Test procedures for the classification of membrane structures regarding fire safety performance 关于防火安全性能的膜结构分类试验程序

10th edition of the conference on Textile Composites and Inflatable Structures Pub Date : 1900-01-01 DOI: 10.23967/membranes.2021.031

C. Maywald, T. Balster

引用次数: 0